The functional group present in propanal is :
(a) $- O H$ (b) $- C O O H$ (c) $- C O -$ (d) $- C H O$

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Solution

(d) $- C H O$
The functional group present in propanal ( $C_{2} H_{5} C H O$ ) is $- C H O$ (aldehyde group).

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Similar questions

Q. Butanone is a four-carbon compound having the functional group:

(a) −COOH
(b) −CHO
(c) −CO−
(d) −OH

(a) Write the formula of the functional group present in carboxylic acids.
(b) Name the functional group present in $C H_{3} - C \equiv C H .$
(c) Name the functional groups present in the following compounds :
(i) $C H_{3} - C H O$ (ii) $C H_{3} - C H_{2} - C O O H$ (iii) $C H_{3} - O | | C - C H_{3}$ (iv) $C H_{3} - C H_{2} - C H_{2} - O H$

Column-A	Column-B	Column-C
(1) Alcohol (2) Aldehyde (3) Ketone (4) Carboxylic acid	(a) $- C O -$ (b) $- C O O H$ (c) $- C H O$ (d) $- O H$	(i) Propanal (ii) Propanone (iii) Propanol (iv) Propanoic acid

Direction : Match the functional group with their formulae and examples.

Column-A Column-B Column-C

(1) _______ _______

(2) _______ _______

(3) _______ _______

(4) _______ _______

Q. (a) What is meant by a functional group? Explain with an example.
(b) Write three common functional groups present in organic compounds. Giver their symbols/formulae.
(c) Name the functional groups present in the following compounds:
(i) CH₃COOH
(ii) CH₃CH₂CHO
(iii) C₂H₅OH
(iv) CH₃COCH₂CH₃
(d) Name the functional group which always occurs in the middle of a carbon chain.
(e) Draw the structures for the following compounds:
(i) Ethanal
(ii) Propanal
(iii) Butanal
(iv) Pentanal

Q. Give the names of the following functional groups:
—OH, >C = O, —CHO, —COOH

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The functional group present in propanal is : (a) −OH (b) −COOH (c) −CO− (d) −CHO

(d)−CHO The functional group present in propanal (C2H5CHO) is −CHO (aldehyde group).

The functional group present in propanal is :
(a) $- O H$ (b) $- C O O H$ (c) $- C O -$ (d) $- C H O$

(d) $- C H O$
The functional group present in propanal ( $C_{2} H_{5} C H O$ ) is $- C H O$ (aldehyde group).